Dustproof seal for bag filling machines



e. LODENK EMPER DUSTPROOF SEAL FOR BAG FILLING MACHINES A ril 9,1935.

2 Sheds-Sheet 1 Filed Oct. 9, 1951 RM 06 E Tk N 2 Mm WM an r a A ril 9, 1935. a. LODENKEMPER 1,997,335

I DUSTPROOF SEAL FOR BAG FILLING MACHII IES Filed Oct. 9, 1931 2 Sheets-Sheet 2 INVENTOR 75 4 G'rdfd lodelzlrerrz ver 5-6 ATTORNEY material to theturbine.

Patented 9, 1935 DUSTPROOF MAC SEAL FOEBAG FILLING HINES I GrhardLddenkmper, Turners Falls Ma ss assigner to AndreasG. m. b. H., Munster, Westphalia, Germany Application October 9, 193i, srialnmsezses s ams]. T (c1. ass- 129 This invention relates to package fllling"ma' chines, and especially to those-which include a turbine for feeding pulverulentmaterial"such as cement into packages, and a hopper for supplying It is custo-mary,-if not absolutely essential, to drive the turbine-propeller at a constant, high rate of speed and when the propeller is rotating inthe cement, orthe like, a very fine dust escapes from=-between the joints adjacent the propeller.- Thisis, of course, highly objectionable Hence, the principal purpose of the invention resides in the provision of improved I means, .which are easily assembled, for sealing such joints againstdust, particularly'the joint between the hopperand the propeller casing, although the sameconstruction' isefiective between the propeller. casingand the. spout througlrwhich the propeller commonly delivers the material to packages, and at otherisirnilarwjoints.

With this object in view, I will now describe a preferred embodiment of my invention, as illustrated in the accompanying drawings wherein:.

Fig. 1 is a front elevation of a machine including my improved construction. Fig. 2 is a side elevation taken on the line 2-2 of Fig. 1. Figs. 3 and 4 are sections taken on the 1ines'3-3 and 44, respectively, of Fig. 2. A Fig. 5 isa perspective View of the elastic band in alternate form. i

. charging material from the propeller housings into bags or other containers, .spouts l2 are secured to the housings by flanges l3 and bolts M, the spouts being, of course, aligned with suitable openings for exhaust of. the material on which the propeller operates. Suitable flanges l5 may be formed on thepropeller housings for. carrying various control mechanism. Carried at the lower .end of each hopper and the upper part of each propeller housing are flanges l6 and I1 which are preferably similar. These flanges may be secured to or formed with the hoppers and propeller housings in any' desired manner. formed in the flanges to enable the hopper to communicate with the inlet opening in the propeller housing, and a gasket l 9 may be interposed ceiving wedge-shaped studs I 8 which align the the flanges and hooked together.

Openings are flangesand maintain them in proper relation to 1 oneanother. r

-Flanges lfi and H are preferably formed circularas shown inFig. 3,. with their outer sides ta- 'peredas at 20, towardthe adjacent faces22 and 23. It isalso advantageous to taper or round the sides, as at 2|, toward the exposed faces 24 andz25 of the flanges. In otherwords, the outerrsideof each flange is generally v-shaped, or tapersiofi toe ward eitherfaceyof the'flange from its maxi-e 5 mum perimeter. This provides a groove! between the flanges and angularsurfacesfor 811-: gagement by elastic band 26 of rubber-likezmw,

terial. A coiled spring 21 surrounds the band shown in Fig. 3, and the coiled spring 21 is 25 placed around the band in the groove between It sometimes happens that it is desirable to replacea turbine, and this is accomplished in a .very simple manner in my construction by disconnecting the flexible couplings ll, knocking out the studs or wedge members l8, and slipping off the spring and rubber band, whereupon after unbolting the propeller housing from the I-beam' 6, the whole turbine can be removedn It will thus be appreciated that my novel joint betweenthe hopper and propeller housing not only has the advantage of being superior in its dust-proof qualities but also simplifies the'assembly and disassembly of the machine. 40

.In Fig. 5 there is shown an alternate for of elastic band which consists of a portion 30 groove between the flanges and a handle portion 3| adapted to be gripped for stretching the band in placing or removingit.

The terms and expressions which I have employed are used as terms of description and not of limitation, and I haveno intention, in the use of .such terms and expressions, of excluding any equivalents of the features shown and described or portions thereof, but recognize that various modifications are possible within the scope ofthe invention claimed.

Certain features are shown but not claimed resilient retaining means surrounding the band and lying at least in part in the groove between the tapered sides.

2. In a machine for flllingpackages with pulverulent material, such as cement, having a pro-'- peller' casing with an opening for material and an adjacent hollow member for communication with said opening, means to connect the member to the casing including proximate flanges carriedtherewith, respectively, alignedstud-receiving openings in the flanges, studs in-said openings, and a tightly'adherent band of impervious elasticwmaterial surrounding the outer sides of,

theflanges.

,3. IriJa-machine. for filling packages with, pulverulent material, such as cemerit,v having a propeller'casing with an opening for material and an: adjacent hollow member, for communication with said opening, means to connect the member' to the casing including, proximate flanges carried therewith, said flanges having outer, sides tapered, respectively, both toward the adjacent faces of the flanges and toward the exposed faces thereof, an impervious elastic band surrounding said outer sides of the flanges, and a tension spring surrounding the band and residing at least in part within the groove formed between the flanges; r

4. In an apparatus for filling containers with pulverulent material, such as cement, having a fixed hopper and a propeller casing: means to connect the hopper to the casing including'c'onduits, proximate flanges located at the junction of said conduits and having outer sides tapered toward the adjacent faces of said flanges, and a'tightly adherent expanded band of impervious elastic material lying against the tapered sides of said flanges and following the contours of said flanges into the groove therebetween.

5i In an apparatus for filling containers with pulverulent material, such as cement, having a fixed hopper and a propeller casing: means to connect the hopper to the casing including conduits, proximate flanges located at the 'junction of said conduits and having outer sides tapered" toward the adjacent faces of said flanges, a band of impervious elastic material lying against the tapered sides of said flanges, and resilient retaining meanssurrounding said band and lying at least in partin the groove formed by said tapered sides. l i

l 6. In an apparatus-for filling containers with pulverulent material,- such as cement, having a fixedihopper and a propeller casing: means to connect the hopper to the casingincluding conduits, proximate flanges located at the junction ofsaid conduits and having outer sides tapered toward the adjacent faces of said flanges, a band of impervious elastic material lying against the tapered sides of saidwflanges, resilient. retaining means surrounding said band and lying at least inpartin the groove formed by said tapered sides, and a plurality of studs inwardly spaced with respect to the outer edges of said flanges for connecting said flanges to each other.

, i GE RI-IARD \LOYDENKEMPER; 

